Thermoelectric Transport in Surface- and Antimony-Doped Bismuth Telluride Nanoplates

Abstract

We report the in-plane thermoelectric properties of suspended (Bi1xSbx) 2Te3nanoplates with x ranging from 0.07 to 0.95 and thicknesses ranging from 9 to42 nm. The results presented here reveal a trend of increasing p-type behavior with increasing antimony concentration, and a maximum Seebeck coefficient and thermoelectric figure of merit at x 0.5. We additionally tuned extrinsic doping of the surface using a tetrafluoro-tetracyanoquinodimethane (F4-TCNQ) coating. The lattice thermal conductivity is found to be below that for undoped ultrathin Bi2Te3 nanoplates of comparable thickness and in the range of 0.20.7 W m1 K1at room temperature.

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Document Details

Document Type
Technical Report
Publication Date
Jul 25, 2016
Accession Number
AD1016744

Entities

People

  • Jaehyun Kim
  • Karen C Bustillo
  • Li Shi
  • Michael T Pettes
  • Wei Wu

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Bismuth Tellurides
  • Charge Carriers
  • Chemical Vapor Deposition
  • Coatings
  • Conductivity
  • Electrical Conductivity
  • Electron Microscopy
  • Fermi Levels
  • Figure Of Merit
  • Materials
  • Materials Science
  • Microscopy
  • Scattering
  • Spectroscopy
  • Thermal Conductivity
  • Transmission Electron Microscopy
  • Two Dimensional

Fields of Study

  • Materials science

Readers

  • Semiconductor Device Technology
  • Thermal Physics or Thermal Science.